pallweber



(No Model.) 2 Sheets-Sheet 1.

J. PALLWEBER.

WATCH CASE SPRING.

No. 447,473. Patented Mar. 3, 1891.

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(No Model.) 2 Sheets-Sheet 2.

J. PALLWEBER.

WATCH CASE SPRING.

No. 447,473. Patented'Mar. 3,1891.

DHHHH HHHIHW H NITED STATES PATENT OFFICE.

JOE-EE PALLXVEBER, OF FURTVVANGEN, BADEN, ASSIGNOR TO SIGMUND STERN, OF FRANKFOR-T-ON-THE-MAIN, GERMANY.

WATCH-CASE SPRING.

SPECIFICATION forming part of Letters Patent No. 447,473, dated March 3, 1891.

Application filed May 27, 1890. Serial No. 353,303. (No model.) i

To a]; whom it may concern.-

Be it known that I, Josnr PALLWEBER, a subject of the Emperor of Austria, residing at Furtwangen, Baden, Geri'nany, have invented a new and Improved Self Closing \Vatch-Case, of which the following is a specificai'ion.

My invention relates to an improvement in spring-lids for watches; and the object of my invention is to provide a spring-lid which, having been opened, as usual, by a pressure on the kn ob or crown, will automatically close again as soon as said pressure has been released.

In the accompanying drawings, Figure l is a central longitudinal section of the watchcase with the lid closed. Fig. 2 is a transverse section of the same seen from below. Fig. 3 is a transverse section of the same seen from above, and Fig. 4 is a face view of the open watch-case. Fig. 5 is a detail side view of the operating mechanism, and Fig. 6 an end view thereof.

The letter A represents a shaft that is connected to a knob or crown B, by which it may be pressed down. The shaft A engages one end of a steel-spring hoop D, placed within one half of the watch-case. The upper end of hoop D is hook-shaped, as at O, and engages the lid and keeps it closed; but when the shaft A is pressed down it carries the end of hoop D with it, and the hook C releases the lid and allows it to open.

The opening and closing of the lid are offected as follows: The lower end of the springhoop D bears against one arm of a lever F, pivoted at E to the watch-case. When the hoop D is forced down, the lever-arm in contact with said hoop will be also forced down and the opposite lever-arm will therefore be raised. Through this other lever-arm passes a pin G, which is secured to the lid. This pin G is lifted by the lever-arm, and the lid is consequently revolved on its hinge and is opened as soon as the knob or crown 13 is pressed down. A spring ll, arranged in that half of the watch-case opposite to the hoop D, acts with a constant pressure on the leverarm opposite to the arm that is acted upon by the hoop D. The spring ll serves to automatically close the lid as soon as the knob or crown I; has been released.

The self-closing of thelid is effected by the pressure of the spring H on the lever E, which, being forced down again, carries with it the pin G, whereby the lid is closed. At the same time the other lever-arm lifts the hoop D and brings the hook O at the upper end of said hoop into engagement with the lid to lock the same. It will be seen that the lid is kept open so long as the pressure continues on theknob or crown 13, while when said pressure is taken off the lid closes automatically.

The lower end of hoop D may be connected to the lever F by means of a small pin engaging a hole or by other suitable means. The lower end of spring ll may be connected to the other arm of lever F in the same manner. In this way a reliable working of the mechanism is obtained.

"What I claim is l. The combination of a watch-case with a pair of springs D H, a lever F, acted upon by both of said springs, a pin G, carried by said lever, and a lid engaged by said pin,substantially as specified.

2. The combination, in a watch-case, of spring D, having hook C, with stem A, that engages said spring, and with spring H, lever F, engaged by springs D H, pin G on lever F, and a lid engaged by said pin, substantially as specified.

In testimony whereof I hereunto sign my name, in the presence of two subscribing witnesses, this 28th day of April, 1890.

- J OSEF PALLWEBER.

Witnesses:

PAULO FELDEN, MURTHE SCHMIDT. 

